x86/pkeys/selftests: Remove dead debugging code, fix dprint_in_signal

BugLink: http://bugs.launchpad.net/bugs/1794889
[ Upstream commit a50093d60464dd51d1ae0c2267b0abe9e1de77f3 ]

There is some noisy debug code at the end of the signal handler.  It was
disabled by an early, unconditional "return".  However, that return also
hid a dprint_in_signal=0, which kept dprint_in_signal=1 and effectively
locked us into permanent dprint_in_signal=1 behavior.

Remove the return and the dead code, fixing dprint_in_signal.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellermen <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180509171342.846B9B2E@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c
index 8537a7cfe1cc113b53cfde1ec7c49730f9d126f3..5f5aedb80e7b9773e1783f8b315755b24e84f5a5 100644 (file)
--- a/tools/testing/selftests/x86/protection_keys.c
+++ b/tools/testing/selftests/x86/protection_keys.c
@@ -325,22 +325,6 @@ void signal_handler(int signum, siginfo_t *si, void *vucontext)
        dprintf1("WARNING: set PRKU=0 to allow faulting instruction to continue\n");
        pkru_faults++;
        dprintf1("<<<<==================================================\n");
-       return;
-       if (trapno == 14) {
-               fprintf(stderr,
-                       "ERROR: In signal handler, page fault, trapno = %d, ip = %016lx\n",
-                       trapno, ip);
-               fprintf(stderr, "si_addr %p\n", si->si_addr);
-               fprintf(stderr, "REG_ERR: %lx\n",
-                               (unsigned long)uctxt->uc_mcontext.gregs[REG_ERR]);
-               exit(1);
-       } else {
-               fprintf(stderr, "unexpected trap %d! at 0x%lx\n", trapno, ip);
-               fprintf(stderr, "si_addr %p\n", si->si_addr);
-               fprintf(stderr, "REG_ERR: %lx\n",
-                               (unsigned long)uctxt->uc_mcontext.gregs[REG_ERR]);
-               exit(2);
-       }
        dprint_in_signal = 0;
 }